package com.mmal.concurrency.src.main.java.com.mmal.concurrency;

import com.mmal.concurrency.src.main.java.com.mmal.concurrency.annoations.NotThreadSafe;
import lombok.extern.slf4j.Slf4j;


import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;

@Slf4j
@NotThreadSafe
public class ConcurrencyTest {

    //请求总数
    public static int clientTotle = 5000 ;
    //同时执行线程数
    public static int threadTotle = 200;

    public static int count = 0;

    public static void main(String[] args) throws  Exception{
        ExecutorService executorService = Executors.newCachedThreadPool();
        final Semaphore semaphore = new Semaphore(threadTotle);
        final CountDownLatch countDownLatch = new CountDownLatch(clientTotle);
        for (int i=0;i<clientTotle;i++){
            executorService.execute( ()-> {
                try {
                    semaphore.acquire();
                    add();
                    semaphore.release();
                } catch (Exception e){
                    log.error(e.getMessage(),e);
                }
                countDownLatch.countDown();


            });
        }

        countDownLatch.await();
        executorService.shutdown();
        log.info("count:{}",count);

    }

    private static void add(){
        count++;
    }
}
